And to japan this evening, where they are celebrating a much-needed victory in that country. Tokyo selected to host the summer olympics in 2020. This was the image of the joyful faces as that announcement was delivered. It comes after a week of new questions about the safety of the toque shefukushima nuclear facility, 150 miles away. Here's abc's aditi roy. Tokyo. Reporter: Crowds erupted in jubilation. Tokyo beating rivals istanbul and madrid to host the 2020 summer olympic games. The decision came after japan's prime minister assured the international olympic committee the fukushima plant isn't a threat. Let me assure you, the station is under control. Reporter: Fewer than 150 miles from tokyo, fukushima plant officials still struggle with containing leaks after a devastating earthquake and tsunami crippled the country two years ago. We have never seen this much radiation coming out of a reactor site, directly into the motion. Reporter: The worst and most recent leak, just a few weeks ago. Authorities say radiation levels 18 times higher than previously reported. Enough to kill someone within just four hours of exposure. The government's latest emergency plan? Building a massive wall of underground ice to block hundreds of tons of radioactive water from seeping into the pacific. Some scientists say this is just a short-term fix. The ice wall will cost about $320 million. That's in addition to the estimated $1 billion it will cost to renovate their olympic stadium.

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